Sandals and beige
On many occasions, I have borrowed items of clothing (usually warm jackets and sweaters) from friends. However, I avoid borrowing clothing to alter my style, to dress up for various occasions. I also avoid renting clothing and second-hand shopping. Even though renting may be a better, more ecological practice, and shopping second-hand is ecological, there are several reasons why I don't participate in these practices. One reason is the size of my wardrobe. I live with only a few items of clothing, and it's helpful when everything comes from the same colour family and thus can be washed at the same time, and when everything has an aesthetic I prefer. If you practise extreme minimalism (rather than e.g. a frugal mode of living), it is easy to sustain it when you live with objects that satisfy your preferences, principles, and needs (also for beauty). For example, I prefer natural materials, simple cuts, calming colours. I care about where and how my clothes are made and how long they will last. Looking for objects that satisfy all the characteristics in second-hand stores (including online) would take time and energy, and I very much dislike shopping. Moreover, I don't want to change my outfits often. Instead, I prefer to participate in normalisation of wearing the same few items of clothing, and normalisation of casual clothing everywhere. For instance, attending one's PhD defence in sandals should be absolutely normal. I avoid renting clothing for the same reason: to normalise casual, everyday clothing everywhere.
Overall, my aim is to avoid eco-consumerism. While it may be addressing the ecological part of consumption, it reproduces consumerism.